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Wu, E.Y.S., Ade, P.A.R., Bock, J.J., Bowden, M., Brown, M.L., Cahill, G., Castro, P.G., Church, S., Culverhouse, T., Friedman, R.B., Ganga, K., Gear, W.K., Gupta, S., Hinderks, J., Kovac, J., Lange, A.E., Leitch, E., Melhuish, S.J., Memari, Y., Murphy, J.Anthony, Orlando, A., Piccirillo, L., Pryke, C., Rajguru, N., Rusholme, B., Schwarz, R., O'Sullivan, Créidhe, Taylor, A.N., Thompson, K.L., Turner, A.H. and Zemcov, M. (2009) Parity Violation Constraints Using Cosmic Microwave Background Polarization Spectra from 2006 and 2007 Observations by the QUaD Polarimeter. Physical Review Letters, 102. 161302.1-161302.4. ISSN 1079-7114
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Abstract
We constrain parity-violating interactions to the surface of last scattering using spectra from the QUaD experiment’s second and third seasons of observations by searching for a possible systematic rotation of the polarization directions of cosmic microwave background photons. We measure the rotation angle due to such a possible “cosmological birefringence” to be 0.55°±0.82° (random) ±0.5° (systematic) using QUaD’s 100 and 150 GHz temperature-curl and gradient-curl spectra over the spectra over the multipole range 200<ℓ<2000, consistent with null, and constrain Lorentz-violating interactions to <2×10-43 GeV (68% confidence limit). This is the best constraint to date on electrodynamic parity violation on cosmological scales.
| Item Type: | Article |
|---|---|
| Keywords: | Parity Violation Constraints; Cosmic Microwave Background Polarization Spectra; QUaD Polarimeter; |
| Academic Unit: | Faculty of Science and Engineering > Experimental Physics |
| Item ID: | 2109 |
| Depositing User: | Dr. Anthony Murphy |
| Date Deposited: | 07 Sep 2010 15:54 |
| Journal or Publication Title: | Physical Review Letters |
| Publisher: | American Physical Society |
| Refereed: | Yes |
| Related URLs: | |
| URI: | https://mural.maynoothuniversity.ie/id/eprint/2109 |
| Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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